Hi Lachlan,
if you're happy with the look and the adjustment layers are not supposed
to be animated or changed in AE how about you smart object everything you can
and bring it with less layers to AE?
other option if you want, I am willing to try it myself on my workstation
if you want to upload the file via wetransfer.Â
troubleshooting Psd/Ai->Ae is one the things I am well experienced at.Â
Roei.